Elevator door



B. WEXLER.

ELEVATOR DOOR. APPLICATION FILED mus, 1911.

Patented Jan. 17, 1922.

UNITED STATES ?ATENT OFFICE.

BENJA'MH'I WEXLER, O1 BROOKLYN, NEXV YORK. ASSIG-NOR TO THE PEELLE COMPANY,

OF BROOKLYN, NEW YORK, A CORPORATION OF NEVT YORK.

ELEVATOR DOOR.

more particularly to that type of door which is l-IHOWH as a truclrable door.

Heretoi ore in doors o'i this type, the top frame of a door has been provided with a laterally extending projecting beyond the sides of the door and adapted to engage stops carried by either the tracks, or guides, fora door. or by the sill of the elevator shaft. Ordinarily a two section counterbalanced door structure used although, under some conditions, a single panel door is employed l Vith either door structure there is tendency of the sudden stopping oi the door at the sill to cause the movement 0'? the door sections, when counterbalancet door used, or of the counterweight,

when a single panel door is used to develop slack in the su iension means for the door "with resultant lnrelihood of a movement of the lower door section, or ot'the entire door, when the other door section or counterwei 'ht, no this slack, Thegreater the length of the suspendh means the greater is the tendency for the creation of this slack, and to minimize this condition it is more or less 2. general practice t term part of his suspending means an eye bar,

in elevator door structures in accordance with l",- invention. with the stops liljZtCEllt the sill, a portion of the suspension means for the doom to accurately position the door with istantially the level i with the two "1c arrange the suspenhe sis aension means l the movement or the Specification of Letters Patent. Patented Ja 17 1922 Application filed April 28, 1917;

Serial No. 165,097.

By reason of the position and construction of the steps they may be quickly assembled in the door structure and are so positioned as to transmit the stresses to the tracks or rails at a point and in a manner to lend the maximum strength to the entire door structure.

The invention consists primarily in an elevator door embodying therein a vertically movable door section, means adapted to counterweight said section flexible suspension means connecting the opposite sides of said door section and said counterweight means a truck harcarried by said door adapted to substantially span the gap between the sill of the door opening and the elevator car, stops mounted in the elevator shaft intermediate the sill and lint-cl oi the door opening and having an opening therethrough respectively through which the sus pension means for said door passes, and contacts carried by said suspension means adapted to engage said stops respectively, whereby said door section will be held by said suspension means with said truck bar on substantially the level of the sill of the door; and in such other novel features of construction and combination of parts as are hereinafte' set forth and described and more particularly pointed out in the claims hereto appended Reterring; to the drawings 1 is an elevation of an elevator door cmbodying my invention;

2 is a plan view of one of the stops and ie contact (to-operating therewith caroy the suspension means;

o. 3 is a rear elevation of a portion of I the tracks or guides the suspension for the do section and of one of said nd l is a side elevation of that portion of the luvention shown in Fig. 3.

Like letters refer to like parts throughout the several views.

In the embodiment of my invention shown in the drawings, I have indicated at a a portion ofan elevator shaft having therein a plurality of door openings b having the usual lintel oand sill (Z;

Upon opposite sides of the door opening 6 are arranged tracks or guides for the door closing the opening, each consistlng of a vei'tl'ca'lly'extending angle bar 6, one flange of which is attached tothewall a, and the the bars f, and the section it has similar shoes h, The type of door shown in the drawings is known as a counterbalanced door,'the section g7t being of substantlally the-sameweight, and being connected at'each side thereof by flexiblesuspension means passing over the pulleys z'i adjacent the door lintel. This suspension means in the form of the invention shown, is of a well known type, consisting of eye bars con- 7. nectedavith the lower door section, and chains 7'"connected with said eye bars,

passed over the pulleys 73-4 and connected with the lower portion of the upper door sect-iong.

The door sections gh are providedwith i any desired form of lock k.

The upper frame of the door section it is provided with a transverse top bar we extending beyond the sides of the door, the eye bars 7' being secured adjacent the opposite ends'of said bar. This bar in addition to serving as a means for attachment of the suspension means for the door structure, also imparts a desired rigidity to the top of the lower door section and acts as a support for a plate nof a width sufficient to substantially span the ap between the sill d and .an elevator car and known in the art as a truck bar. This construction is not essential to my present invention, however, and is merely a matter of design. c r V Heretofore, it has been a common prac: ties to provide stops'within the elevator shaft adjacent the sill 03 adapted to be engaged by the protruding ends of the top bar m, when the door is opened to the full extent, so as to'accurately position the truck bar, with relationto the plane of the door sill. With this construction, if thedoor be opened violently, the engagement of the said barand stops, and'the momentum acquired by theupper door section, or by a counterweight where a single door panel was used, would result in the creation of conslderable slack in the chains j allowing the rods j to swing out of the vertical plane.

The effect of the slack was to permit a return movement of the upper-door section with a sufficient velocity to' not only subject the suspension means to violent stresses tending to strains or break same, but to raise the lower door section slightly so that the passage of a loaded vehicle over the truck bar, would subject the stops to severe, blows which would tend to disarrange the entire door structure. I 1 r 3 c To avoid this condition, I so constructthe door and its suspension and guiding means,

that the stops acting directly'upon the lower door section will be dispensed with, and the In securing these results, I mount upon each track or guide, a bracket 0 at a point substantially midway between the sill and lintel of the dooropening, which bracket has therethrough; a vertically extending guide opening 0 throughwhich the suspension means passes. About said opening 0" a horizontal seat isformed upon the bracket, which seat is adapted to engage a contact member p carried by said suspension means.

In the form of the invention shown, this member p comprises an enlarged head upon being slipped over the bar j and attached to the bar 6 in assembling the door. In this manner, the accurate positioning of the two brackets used upon each door is facilitated, and side swayingofthe bar y' is prevented, in all directions except toward the guide 6.

The quantity of'this movement is so limited,

however, that itis not objectionable.

The lower end of each'eye bar 7' is screw threaded, as shown in Fig. 1, this screw threaded end being passed through an opening in the top bar at and adjustably secured in relation thereto by means of the nuts 7 By this construction the truck bar may be leveled at any time.

Other well known means of attaching the suspension means to the top bar, may be employed, however. The operation of the herein described device is substantially as follows After the tracks or guides ef have been installed in the elevator shaft 6 and the doors gh have been mounted thereon and connected by the suspension means j-y", the truck bar 72. of the lower door section is brought upon the plane of the sill d by means of the nuts gg', the upper door section 9 being accurately positioned in re- .lation to the lintel 0. hen the parts are in this position a bracket 0 is located upon one flange of each of the bars 6 in the proper relation to the contact members p. The bracket 0' is then slipped with the arms 0 -0 thereof on opposite sides of'the eye bar j and secured by bolts, rivets or in any desired manner to the bar e. In this manner. accurate positioning of the truck bar each time the door is opened, is assured.

In use, when the lock is is released and the section 9 is moved upwardly, the door section 71 willdescend, the eye bars 7' being held in substantially vertical position by the bracket 0 during this movement. In the event that the section 9 is moved up too violently, some slack may be created in the flexible section j of the suspension means, but under no circumstances can the eye bar j move away from the bar 6. In this manner, the engagement of the contact members 79 with the seat upon each bracket 0, will arrest the downward movement of the lower section it and hold the door suspended from said bracket.

By using a rigid section of the suspension means for sustaining the load of the lower door section a loss of accuracy in the posi tion of this section by the stretching of the suspension means is avoided. In this respect, the use of eye bars is preferable to the use of the continuous chain extending from door section to door section. By preventing side swaying of the eye bar section, the snapping of the suspension means in this slack is prevented.

By using a bracket having an extended base, as shown. and by mounting this bracket intermediate the sill and linteLlikelihood of displacement thereof is reduced to a minimum. Furthermore, the construction de scribed, limits the application of stresses upon this bracket to directly vertical stresses.

It is not my intention to limit the invention to the precise details of construction shown in the accompanying drawings, it being apparent that such may be varied without departing from the spirit and scope of the invention.

Having described the invention what I claim as new and desire to have protected by Letters Patent is 1. An elevator door embodying therein a vertically movable door section, means adapted to counterweight said sect1on,fle'xible suspension means connected with the opposite sides of said door section and said counterweight, a traction surface at the top of said door section adapted to substantially span the gap between the sill of the door opening and the elevator car, stops mounted within the elevator shaft at opposite edges of, and intermediate the sill and lintel of the door opening, said stops each having an opening extending therethrough, the suspension means for said door passing through said openings respectively, and contacts carried by said suspension means and adapted to engage said stops respectively whereby said door section will be held by said suspension means with said traction surface on substantially the plane of the door sill.

2. An elevator door embodying therein vertically extending tracks or guides upon opposite sides of the door opening, a verti- I cally movable door section slidably mounted upon said tracks or guides, means adapted to counterweight said section, flexible suspension means connecting opposite sides of said door section and said counterweight, a traction surface at the top of said door section adapted to substantially span the gap between the sill of thedoor opening and the elevator car, stops mounted upon said tracks or guides intermediate the sill and lintel of the door opening, said stops each having an opening therethrough, the suspension means for said door section passing through said openings respectively, and contacts carried by said suspension means and adapted to engage said stops respectively whereby said door section will be held by said suspension means with said traction surface on substantially the plane of the door sill.

3. An elevator door embodying therein a plurality of door sections vertically movable in opposite directions in the same plane, pulleys at each side of said door opening adjacent the lintel thereof, flexiblesuspension means passing over said pulleys and connecting the opposite sides of said door sections with each other, a traction surface at the top of the lower door section adapted to substantially span the gap between the sill of the door opening and the elevator car. stops mounted within the elevator shaft at opposite edges of, and intermediate the sill and lintel of the door opening, said stops each having an opening extending there through, the suspension means for said lower door section passing through said openings respectively, and contacts carried by said suspension means and adapted to engage said stops respectively whereby said door section will be held by said suspension means with said traction surface on substan tially the plane of the door sill.

4. An elevator door embodying therein vertically; extending tracks or guides upon opposite sides 'ofthe doorbpening, a plurality ofdoor sections slidably mounted upon said tracks-on guides and-adapted-to' have 'mo'vement in opposite directions in the same plane, pulleys at; each side ofsaid door opening adjacent'the'lintel' thereof, flexible suspension means passing over said pulleys and connecting the opposite sides of said 'sections' with each other, a traction surface at at the top of the lower door section adapted to substantially span the gap between the sill ofthe door opening and the'elevator car,-

stops mounted upon said tracks or guides lntermedlate the S111 and lintel of the door opening, said stops each having an opening therethrough, and the suspension means connecting said do'or sections passing through said openings respectively, and contacts'carri'ed'by said suspension means and adapted to engage said stops respectively whereby said lower door section will be held" by said suspension means with=said tractionsurface on substantially the plane-of the doorsill.

5.1An elevator door "embodying therein" vertically extending tracks orguides upon opposite-sides of the door opening, a plu rality of door sections slidably mounted upon said tracks or guides and vertically movable in opposite directions inthe same plane, pulleys at each side of'the door sec tion adjacent the lintelthereof a traction 7 surfa'ceat the top of the lower door section adaptedto-substantially span the gap be- 1 tween thesill of the door opening andthe elevator car, brackets mounted upon said tracks or guides intermediate the sill and lintel of the dooropening, said brackets each having a horizontally extending seathaving an opening therethro'ugh, eye bars connected, with the pposite sides of the lower doorsection passing through the openings of said 7 brackets respectively, an enlarged head upon said eye bar adapted to engage the seat upon said brackets respectively when said traction surface is on substantially the plane of the door sill, and a flexible connection between the enlarged'head'of said bars and.

the other door section, said flexible connections passing over sa d pulleys.

6. An elevator door embodying therein' vertically'extending tracks or guides upon opposite sides of the door opening, a pluralitylof door sections slidably mounted upon said tracks orguides and vertically movable in opposite directions in the same plane, pulleys at each side of the door section adjacent the lintel thereof a traction surface at the top of the lower door section adapted to substantially span the gap between the sill of the door opening and the elevatorcar, brackets mounted upon said" tracks or guides intermediate the sill and.

lintel-of'the door opening, said brackets each havinga"horizontally extending seat having an opening therethrough,eye bars connect-- ed wit-lithe opposite sides of'the' lower door section passing through the openings of said brackets respectively, an enlarged head upon each of said eye bars adapted to engage the seat upon each-of said brackets respectively to said eye" bars with said tracks or guides after said suspensionmeans" have been connectedwith said door section.

'7. An. elevator .door embodying therein vertically extending'tracks'or guides upon opposite sidesfof'the door opening, a plurality of door sections slidably mounted upon said tracks or guides and vertically movable 'in' oppositedirections in the same plane,"pulleys at each side of the door secvtion adjacent the lintel thereof a traction surface at the top'of the lower door section and adapted to'substantially span the gap between the sill of the door opening and theelevator car, bracketsmounted upon said tracks or guides intermediate the sill and:

lintel of the door opening, said brackets each having a horizontally extending seat having an opening therethrough, eye bars connected with the opposite sides of the lower door section passing through the openingsof said brackets respectively, an enlarged head upon each; of said eye bars adapted to engage the seat upon each of said brackets're'spectiv'el y. when said traction surface ison sub-- stantially the planeof the door sill, a flexible connection between the enlarged head of each of said'bars and the other door section, said flexible connections passing over said pulleys, said'brackets being bifurcated whereby they may be adjusted with relatlon to said eye bars uponsaid tracks, or-

guides after said suspension means have been connected'with said door sections, and means whereby-theconnections between said eye bars respectively and said lower door section may be adjusted to vary thelength of said connectlonsbetweenthe door sections to .accurately-.posit1on the lower section with relation to the=lower sill.

In witness whereof, I hereunto, have af-V fixed my signature in the presence of two Aprilil9l7,

' BENJAMIN XVEXLER, lVitne'ssesz- BERTHA MUELLER, CLAmcE FRANCE.

iii)

subscribing witnesses, this second day of 

